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预应力自复位混凝土框架结构(简称PTED结构)具有独特的受力性能。为了研究其抗震性能,基于弹塑性有限元分析程序Open Sees,提出PTED节点的数值模拟方法,并利用编制的角钢拉压恢复力模型,对5个PTED节点的低周往复荷载试验进行数值模拟并与试验结果对比。研究结果表明:通过合理的建模和参数选择,采用Open Sees有限元分析程序可以较准确地模拟出试件试验过程的滞回曲线,数值模拟所得的各极限状态点对应的荷载及位移与试验结果较吻合,同时可准确地模拟出角钢、预应力筋及梁端截面的力学行为。采用该文方法进行的数值模拟与试验结果吻合较好,精度可满足工程需求。
Prestressed self-resetting concrete frame structure (referred to as PTED structure) has a unique force performance. In order to study its anti-seismic performance, based on the elasto-plastic finite element analysis program Open Sees, a numerical simulation method of PTED node was proposed. The low-cycle cyclic loading test of five PTED nodes was simulated by using the model of tension-compression restoring force Contrast with test result. The results show that the Open Sees finite element analysis program can accurately simulate the hysteretic curve of the test specimen through reasonable modeling and parameter selection. The load and displacement corresponding to each limit state point obtained by numerical simulation The results are in good agreement with each other and the mechanical behaviors of angle steel, prestress tendons and beam end sections can be accurately simulated. The numerical simulation using this method is in good agreement with the experimental results, and the accuracy can meet the engineering requirements.